water that moves downward through the soil profile below the root zone and cannot be used by plants List of Glossary Terms
The downward movement of water through the soil below the plant root zone.
Downward movement of water through the soil profile to ground water.
The drainage of soil water by gravity below the maximum effective depth of the root zone.
Irrigation water percolating below the root zone where it is lost to crop production.
Soil water that infiltrates below the root zone toward the water table.